baber/WOPTO huggingface dataset:
Patent GB-948178-A (GB)
Title: Narrow band notch filter
IPC: H01L27/07
Filed: 1961-09-25
Abstract: 948,178. Semi-conductor devices. WESTINGHOUSE ELECTRIC CORPORATION. Sept. 25, 1961 [Oct. 25, 1960], No. 34257/61. Heading H1K. A semi-conductor device for use as a narrow band filter comprises a semi-conductor wafer with a PNP or NPN zone configuration between its major faces, two ohmic contacts spaced apart on one of the major faces, and a pair of ohmic contacts, one of which covers a major part of the face spaced apart on the other major face. A typical device (Fig. 1), is made by diffusing gallium into an N-type silicon wafer 9 to provide P-type surface zones 5 and 7 and then alloying gold contacts 2, 4, 22 and 24 to the P-type zones. In operation with junction 11- reverse biased the frequencygain characteristics shown in Fig. 3 are obtained rL for different values of α .α + where r is R distributed resistance per unit length of zone 5, C the capacitance per unit length of junction 11 and R the resistance of zone 7 between electrodes 22 and 24. The filter may be tuned by variation of the bias voltage, of which both r and L are junctions. Adjustment of R to obtain an optimum value of α for a given frequency may be provided by altering the position of contact 24 or by etching the surface of zone 7 between contacts 22 and 24. Specification 908,553 is referred to.
Patent GB-1407714-A (GB)
Title: Indentors
IPC: G01N3/42
Filed: 1973-07-19
Abstract: 1407714 Hardness indenter DE BEERS INDUSTRIAL DIAMOND DIVISION Ltd 19 July 1973 [19 July 1972] 34410/73 Heading G1S The degree of penetration of an indenter is dependent on the crystal plane being indented and on the orientation of the indenter with respect to that plane so that often the hardness number for a material varies through a range. The present diamond indenter (H 5 ) Table 1 (not shown) produces a separate and distinct range for each material shown which does not overlap the range of the other materials tested, and as such it produces results which are unlike those produced by known indenters coded (H K ) and (H B ) in the table which produce ranges which overlap for different materials. It is stated that these unique results are produced by providing the indenter with a shape (e.g. a pentagon) providing a non-crystalline symmetry, i.e. it does not have the crystal symmetry of the substance from which it is made.
Patent GB-827547-A (GB)
Title: Improvements in or relating to flooring materials and methods of laying the same
IPC: E04F15/022
Filed: 1956-11-09
Abstract: 827,547. Floor panels; wood block flooring. VIGERS, F. W. Aug 30, 1957 [Nov. 9, 1956], No. 34411/56. Classes 20(4) and 87(1) [Also in Group VIII] A flooring panel comprises abutting blocks 1 of wood, cork, synthetic plastics, &c, providing a continuous flat underface and mounted on a flexible backing sheet 3 which has been impregnated with a rubber plastic, or bituminous material. The blocks may be interlocked by means of tongues 7 and grooves 8, or rabbets 9, or may have grooves connected by separate slats. Tongues and grooves may be provided also on the free edges of the panel. The blocks are secured to the backing sheet of roofing felt &c. by bitumen, phenolic or epoxide adhesives. In laying a floor, a coating of a bituminous emulsion containing a filler is applied to a concrete floor-bed or to a thin cement layer on the floor-bed, and the preformed panels are bedded on to this layer. The bituminous emulsion which preferably consists of a mixture of sand, cement, bitumen and water is applied in the consistency of a moble gel to a depth of about # inch. The Provisional Specification describes also a panel wherein the constituent blocks are not interlocked and wherein the blocks may be of thick linoleum.
Patent GB-410229-A (GB)
Title: Improvements in or relating to sliding windows
IPC: E05F11/38
Filed: 1932-12-05
Abstract: 410,229. Sliding - window holders. PETERS & CO., Ltd., G. D., and DISMORE, A. V., Windsor Works, Slough. Dec. 5, 1932, Nos. 34429/32 and 20857/33. [Class 44.] A sliding sash is held in its closed or one of a number of open positions by the engagement of projections 17 thereon with recesses 15 in a rack bar 14 on the fixed frame 5 and spring-pressed shoes 8 are arranged between the sash and the fixed frame to hold the projections 17 in engagement with the recesses 15. The sash frame preferably consists of a channel 4<a> carrying the glass 1 and a channel 4b at right angles thereto in which the shoes 8 are pivotally mounted at 9 and are pressed outwards by loosely mounted helical springs 10 held in position by pins 11 and cylindrical tubes 12. Outward movement of the shoes 8 is limited by stops 13. To open or close the sash, it is moved laterally to disengage the projections 17 from the rack bar 14 either by a direct pull or push on a handle 7, Fig. 3, fixed to the top of the sash, or by rotation of a spring-returned rock shaft 20, Fig. 5, mounted in a housing 19 on the top edge of the sash and having cams 23 to co-operate with the rack bars or parts of the fixed frame channels. According to both the Provisional Specifications, the spring-pressed shoes 8 may be in the form of plungers mounted between lugs in the channels 4<b> and each pressed out by two helical springs. According to the second Provisional Specification, the spring-pressed shoes 8 may consist of leaf or plate springs fixed at one end to the channel 4b and pressed out, if desired, by helical springs arranged as in Fig. 3.
Patent GB-617422-A (GB)
Title: Improvements in means for securing elements together in vehicle construction
IPC: B62D33/027
Filed: 1945-12-20
Abstract: 617,422. Folding seats. WILLYS-OVERLAND MOTORS, Inc. Dec. 20, 1945, No. 34525. Convention date, Feb. 3. Drawings to Specification. [Class 52 (ii)] [Also in Group XXV] A seat is connected to a vehicle body for 90 degrees of pivotal movement by means of hinge pins having parts of non-circular section which are in alignment with slots in the bearing members when the seat is in the mid position of its pivotal movement to permit its removal from the vehicle.
Patent GB-603474-A (GB)
Title: Improvements in or relating to range finders
IPC: G01C3/10
Filed: 1945-12-20
Abstract: 603,474. Range-finders. KODAK, Ltd. Dec. 20. 1945, No. 34568. Convention date, March 13, 1943. [Class 97 (i)] In a coincidence or stereoscopic range-finder in which images from the ends of a base are formed in a comparison plane or planes by an optical system including a light deviator for effecting coincidence or stereoscopic fusion of the image, an adjustment mark is located in each plane or planes and an image of one mark is formed adjacent the other by the optical system of the finder, excluding the light deviator, so that non-coincidence of mark and image indicates maladjustment of the instrument. The coincidence finder shown comprises end prisms 10 from which images are formed in the plane 20 of an eyepiece 13 by lenses 11 and crossed prisms 12, a deviator 15 effecting coincidence. The plane 20 carries two diamondshaped marks and a vertical line. The latter is illuminated by a lamp 18, light from which passes via the right-hand objective 11 and prism 10 to a small prism 21 whence it is directed via a similar prism 22 and the other optical system to form an image in the plane 20 which, when the instrument is correctly adjusted, falls between the two marks. The marks may be carried on a plate separate from the eyepiece and observed by an independent observer. A stereoscopic finder is also described in which the image of a line in one comparison plane is formed adjacent two marks in the other plane by a similar prism system.
Patent GB-507340-A (GB)
Title: Improvements in and relating to electric discharge lamps, suitable for use in connection with sound films, picture telegraphy television and the like
IPC: H01J17/00
Filed: 1937-12-14
Abstract: 507,340. Discharge lamps. MASSOLLE GES., J., and MASSOLLE, J. Dec. 14, 1937, No. 34589. Convention date, Dec. 15, 1936. [Class 39 (i)] A glow lamp having a screen directly in front of the anode to concentrate the more positive part of the discharge is provided with means for reducing the deficiency of the filling arising during operation in front of the anode due to the narrowness of the concentrating aperture. As shown, a lamp comprises a circular wire, hot cathode 6, an anode 2, a gauze or solid metal screen 3 with a polished end 4 having a conical aperture, and an outer screen 5 of conducting or insulating material. The screens are provided with apertures 9 so staggered or arranged that a discharge cannot pass through them but admitting gas to the region in front of the anode. The screen 3 is connected to the anode potential through an impedance 8 and serves as a starting electrode receiving a constant discharge. Electrode dimensions are specified. The lamp may be connected in series with an amplifier valve or may contain a control grid enclosing the cathode. The lamp may be filled with neon, helium, or nitrogen. Instead of or in addition to providing apertures 9, up to 15 per cent of a gas of high ionic mobility such as hydrogen may be added to the filling. The gas pressure may be between 0À6 and 6 mms.
Patent GB-1441103-A (GB)
Title: Separation process
IPC: C08F6/00
Filed: 1972-07-25
Abstract: 1441103 Purifying resins IMPERIAL CHEMICAL INDUSTRIES Ltd 18 July 1973 [25 July 1972] 34639/72 Heading BIB A method of separating a mixture comprising a resin component as defined later and one or more components substantially more volatile than the resin comprises introducing the mixture at an elevated temperature and pressure and under adiabatic conditions into a zone held at a lower pressure to vaporise at least some of the more volatile component, the resulting liquid resin being absorbed in said zone in a mass of the liquid resin held at sufficeintly elevated temperature to maintain it in a relatively mobile condition, liquid resin being withdrawn from the zone at such a rate to maintain the mass in the zone substantially constant. The resin component is derived from petroleum fractions and is viscous at 120‹C and thermally unstable at 200‹C. An apparatus suitable for use in the above method comprises a hollow chamlber lagged on its outside wall and provided with vapour exit line, a sump for liquid resin, heating means for the resin and take off means for the resin and in which the hollow chamber forms the upper portion of a column which is provided with a packed middle portion, a lower portion in the form of a reservoir, and means for providing an upward flow of steam in the said middle portion whereby molten resin passes from the hollow chamber, through the packed middle portion countercurrent to a flow of steam and finally collects in the reservoir.
Patent GB-1156091-A (GB)
Title: Rotary-Scythe Lawn Mower.
IPC: A01D34/63
Filed: 1966-08-02
Abstract: 1,156,091. Rotary-scythe mowers. YARD-MAN Inc. 2 Aug., 1966 [3 Sept., 1965], No. 34656/66. Heading A1F. A rotary-scythe mower comprises a cast, light-alloy body or outer housing 10 providing a deck-portion 12 to carry an internal combustion engine 44, the body also carrying front and rear wheels 36, and a pressed-steel, or impact-resistent plastics, blade-housing 60 of volute form incorporating an air-guiding channel 74 leading to an outlet for cuttings, the outer housing being of greater rigidity than the blade-housing. The deck is recessed at 18 and the lower end of the engine crankshaft is connected to the blade 54 through a clutch mechanism 52 enabling the drive to be disconnected at will. The engine cam-shaft 50 extends below the deck and provides a drive to the rear wheels through a mechanism 38 controllable through raising and lowering of the rear handlebars 42. The front wheels are mounted on a common axle 80 adjustably received in slots 88 in the body 10, the axle being urged by springs 90 into the appropriate slots.
Patent GB-944514-A (GB)
Title: Improvements in or relating to hydraulic accumulators
IPC: F15B1/24
Filed: 1959-10-13
Abstract: 944,514. Hydraulic accumulators. FIELDING & PLATT Ltd., R. H. GREEN, and K. N. DANIELL. Nov. 14, 1960 [Oct. 13, 1959], No. 34711/59. Heading F1P. A gas-loaded hydraulic accumulator comprises a hollow piston 3 having walls 2 extending to form a skirt and affording positive separation of the liquid and gas mediums contained in the accumulator. The cylinder 1 of the accumulator is formed with a shoulder between which and a sleeve 7 pressed towards the shoulder by a screw-threaded member 9 and a plug 8 are an abutment ring 6, seals 4, and a guide bush 5 engaging the walls of the piston, the top and bottom surfaces of which are subjected to gas, preferably air, and oil pressure, respectively. A passage 10 passes any gas or oil tending to pass the seal to atmosphere. When the liquid approaches a low level in the accumulator, a shoulder 14 on the piston engages the ball 15 of a plunger 16 which is disposed in a housing in an aperture 12 in the cylinder and actuates a switch 11 to operate a pump to recharge the accumulator. Leaking past the plunger is prevented by seals 19, 22. In an alternative construction, the plunger is spring-urged out of engagement with the switch when the piston is away from the switch-operating position.
Patent GB-467243-A (GB)
Title: Improvements relating to the production of electrical insulating materials
IPC: H01H85/26
Filed: 1935-12-16
Abstract: A porous electric insulating article of low dielectric constant and low dielectric loss is made by shaping and firing a mass containing a high proportion of silica or silicic acid, a substantial part of which is in the chemically precipitated form. A mixture of approximately equal parts of quartz glass and precipitated silicic acid is suitable.  In an example, the raw mass comprises 50 parts by weight of precipitated silica acid, 42 parts of quartz glass powder, 5 parts of a plastifying agent such as clay, bentonite or soapstone and 3 parts of a flux such as calcium carbonate.  The fired mass may be impregnated with an organic insulating material, e.g. paraffin or polymerized hydrocarbons.
Patent GB-996288-A (GB)
Title: Improvements in pattern tracing
IPC: B23K9/127
Filed: 1961-09-28
Abstract: 996, 288. Photo-electric line followers. STEWARD-WARNER CORPORATION. Sept. 28, 1961 [Oct. 10, 1960], No. 34950/61. Heading G1A. [Also in Divisions B3 and G3] In automatic line tracing apparatus of the kind in which a sensing element 14 (Fig. 3) gives a control signal indicative of the displacement of the element 14 from the line 16 to be traced and rotates simultaneously and equally with the carriage 20 to which is secured a wheel 22, the carraige 20 and the element 14 being rotated by a steering device 18 responsive to the control signal, the plane defined by the axis of rotation 24 of the wheel 22 and the point of contact 32 of the wheel on the driving surface is displaced behind, with respect to the direction of travel of the wheel, the axis of rotation 26 of the carriage 20. The apparatus which is coupled to a flame torch (Fig. 1a not shown) is otherwise similar to that disclosed in Specification 995,421 which is referred to. In the wheel carriage (Fig. 4) the gear 54 driven by the steering device (not shown) rotates the member 46 and the driving head 52 to which is secured the wheel 22. This wheel is driven by a motor 60 through shaft 56, the gears and idlers 66, 88, 72 and 74 giving the necessary displacement of axes "d" said to be 0.040 and which enables the apparatus to accurately follow sharp bends in the line to be followed. The wheel may also be displaced to one side of the axis of rotation 26 of the carriage (Fig. 5 not shown).
Patent GB-1501273-A (GB)
Title: Producing a flow restrictor
IPC: A61M39/08
Filed: 1975-08-22
Abstract: 1501273 Plastics tube; valves AVON MEDICALS Ltd 18 Aug 1976 [22 Aug 1975] 34989/75 Headings F2P and F2V [Also in Divisions B4-B5] A capillary passage comprises a flow passage 9 (Fig. 1) within the body of a PVC tube 4 flattened and welded at its contacting inner surfaces 8 to eliminate the interface. The flow passage 9 runs parallel to a layer diameter bypass 12 (or is flanked by two bypasses) having a flattened, welded side 10. The tube 20 shown in Fig. 5 includes two axially spaced capillaries 11/13 of different diameters, with associated parallel by-passes 15/17 and a connecting passage 22. Closing of a chosen by-pass forces fluid to flow through the associated capillary, and is effected by a roller clamp 38 (Fig. 7) moving in grooves 36 in a channel member 34. The tube 20 lies along the channel base 32. Pressure on the tube is limited by the grooves 36, so that the thickness of the closed by-pass walls is greater than that of the capillary (see Fig. 3, not reproduced), and the grooves allow pressure release by raised portions 42. The tube 20 &c. is used to govern flow rate leading to a cannula or needle; priming is effected with all passages open, followed by selected clamping. Making of the tube is described (see Divisions B4-B5).
Patent GB-647799-A (GB)
Title: Electroplating method employing pulsating current
IPC: C25D5/18
Filed: 1947-12-31
Abstract: 647,799. Electro-plating. POOR & CO. Dec. 31, 1947, No. 35113. Convention date, May 4, 1942. [Class 41] A method of electro-plating comprises applying to the cathode a pulsating direct current voltage having a direct current component and an alternating current component, the lowest instantaneous value of the pulsating voltage at the negative alternating peak being between 0.5 volts and 1.5 volts, the direct current component having a voltage not substantially higher than 24 volts and the alternating current component having a frequency within the range of from 25 to 60 cycles. The method may be applied to the electro-plating of various metals especially zinc, copper, cadmium, silver and arsenic-antimony alloy. In the arrangement shown in Fig. 1, electrodes 2 in a plating tank 1 are connected as shown to a D.C. generator 3 in series with a secondary winding 6 of a transformer 7. A storage battery 5 is connected in parallel with the generator. The primary winding 8 of the transformer is connected to a source of A.C. supply and is in series with a variable inductance 9. In a modification, the battery 5 is replaced by a condenser. In other arrangements the inductance 9 is replaced by an adjustable reactor with three legs, two for the transformer windings and the third for a winding connected through a variable resistance to a source of direct current. In a further arrangement, the secondary winding of the transformer and the D.C. generator are connected in parallel to the electrodes. In the arrangement shown in Fig. 6, three pairs of electrodes are connected to a D.C. generator 44, and two pairs to the secondary 47 of a transformer 45. Calcium gluconate may be added to the electrolyte as a control agent, with lauric sulphonate provided to assist in retaining the gluconate in suspension.
Patent GB-921226-A (GB)
Title: Remotely-controlled mechanism for rearview mirror, particularly for cars and the like
IPC: B60R1/068
Filed: 1959-10-16
Abstract: 921,226. Rear-view mirrors for vehicles. JERVIS CORPORATION. Oct. 16, 1959 [Dec. 3, 1958], No. 35184/59. Class 103(2). A remotely controlled rear-view mirror for a vehicle comprises, a mirror 44 Fig. 2, in a backing plate 46 supported for universal movement on a projection 27 carried by a hood 16 having a pedestal 13 and mounting plate 12 securable to a fender 87 of the vehicle; a pair only of cables 52, 53 connected to the mirror backing at positions offset horizontally and vertically from the projection 27 and connected to a remotely positioned control knob 79; and a spring 43 offset from the cables and urging a pin 41 against the mirror backing. The pin 41 is slidable in either one of a pair of openings 28, 29 in a thickened portion 26 of the hood wall 17 and positioned above and below the projection 27 carried by the portion 26. An enlarged hemispherical head 42 of the pin engages a correspondingly shaped recess in the backing plate 46 and the spherically curved end of the projection 27 engages a correspondingly shaped recess 48 in the backing plate. The cables 52, 53 Fig. 3, are slidable in a common casing 51 and have ends passing through key-hole shaped slots 57, 58 in the backing plate and are secured thereto by having end enlargements 59. The casing 51 is received in either one of a pair of cable slots 34, 35 positioned above and below the projection 27 and the cables 52, 53 are guided round shaped portions of the wall portion 26. The cables 52, 53 are the two halves of a single cable having, remotely from the mirror and substantially midway between its ends, a loop 61 engaged in a groove 78 in the end of an actuating element 62, universally pivoted and under the urge of a spring 82 in a U-shaped mounting bracket 64 securable by a screw 93 to a dash panel 84. The element 62 is provided with the control knob 79. The end of the cable casing 51 remote from the mirror engages in a slot 73 in the bracket 64. By pivoting the element 62 upwardly or downwardly both cables 52, 53 move together and pivot the mirror about a horizontal axis, on the projection 27. The friction of the cables in the casing overpowers the springs 43, 82. If the knob is rotated, the cables 52, 53 move relatively to each other and the mirror is pivoted about a vertical axis. Lateral movement of the element 62 will cause pivotal movement of the mirror about both horizontal and vertical axes. In another embodiment the spring is not combined with a pin and is positioned below the projection supporting the mirror. Instead of being supported by a projection from the wall of the hood the mirror backing may have diametrically opposite upper and lower pivots engaging in slots in the side wall of the hood, as described with reference to Fig. 7 (not shown). The spring in this case engages between the rear walls of the hood and mirror backing. In other embodiments, tension springs are used in lieu of the compression spring 43.
Patent GB-1398876-A (GB)
Title: Coated peroxygen compounds
IPC: C01B15/00
Filed: 1972-07-27
Abstract: 1398876 Coating peroxygen compounds INTEROX CHEMICALS Ltd 12 July 1973 [27 July 1972] 35205/72 Heading C1A [Also in Division C5] Solid organic or inorganic peroxygen compounds are coated with a coating agent comprising a condensation product of at least one fatty acid having at least 8 carbon atoms and a poly- (alkyleneglycol) or a poly-(alkyleneglycol) terminally substituted by one or more amino groups. The poly(alkyleneglycol) may be polyethyleneglycol or polypropyleneglycol, and the peroxygen compounds may be alkali metal perborates, permonosulphates, and adducts of hydrogen peroxide with alkali metal carbonates, tripolyphosphates and pyrophosphates, e.g. sodium percarbonate or sodium perborate tetrahydrate. The coated peroxygen compounds may be used in detergent compositions, which may contain an enzyme. If the coating compound melts above 25‹ C., 0À1 to 20% by weight of coating agent may be used; if the melting point is below 25‹ C., 0À2 to 5% of the coating agent may be used.